Modbus Tcp/Ip message timeout

Hi!

I have a question about your experience with Modbus TCPIP.
I am using the Modbus.cpp library - Source for Modbus Base Library Copyright (C) 2014 Sarmento Barbosa

I receive 10 variables of type Int and from time to time only the first values are read and the remaining values are reset.

What could be the reason?

Ed_Modbus_IP_Temperatury_V2.ino (5.76 KB)

I extend the time and the request is send every 5 second. Delay time for message error is 2 seconds.
With this setup is possible to observe that every second request the answer is coming in proper time.